Fractured reservoir multi-scale fracture simulation method and computer readable storage medium

A simulation method and multi-scale technology, applied in the field of reservoir numerical simulation, can solve the problems of small size, weak conductivity, and inability to achieve both accuracy and efficiency, and achieve the effect of improving efficiency and accuracy

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Some fractures, such as fracturing secondary fractures and small-scale natural fracture networks, are usually small in size and weak in conductivity, and are distributed in a network-like staggered distribution, which is suitable for simulation by the dual-media model. If the discrete fracture model is used , will cause too many grids and the calculation speed is too slow (Sarma, P. and K. Aziz. New transfer functions for simulation of naturally fractured reservoirs with dual porosity models. SPEA annual Technical Conference and Exhibition, Society of Petroleum Engineers, 2004 )
Although there have been many improvements in the calculation methods of dual-media model parameters in recent years, such as the use of flow-based upscaling methods to calculate the permeability and channelin

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fractured reservoir multi-scale fracture simulation method and computer readable storage medium
  • Fractured reservoir multi-scale fracture simulation method and computer readable storage medium
  • Fractured reservoir multi-scale fracture simulation method and computer readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] figure 1 is a schematic diagram of the simulation method according to the present invention. Such as figure 1 As shown, the simulation method includes:

[0050] S110, acquiring matrix corner grid model data, matrix attribute model data, fracture network model data, and fracture attribute model data from the dual-porous media model;

[0051] S120, classifying the fracture network model into primary fractures and secondary fractures;

[0052] S130, constructing an unstructured basic grid based on the corner grid model and the main-level fractures;

[0053] S140. Perform attribute mapping on the unstructured basic grid by using the matrix attribute model and the fracture attribute model;

[0054] S150, modifying the matrix properties of the mapped unstructured base grid; and

[0055] S160, calculating the conductivity of the unstructured basic grid after attribute correction, to obtain an unstructured mixed grid model.

[0056] In S110, the data that the present inve...

Embodiment 2

[0111] In this example an example of a multi-scale fractured reservoir is shown, such as Figure 6 As shown in the present invention, according to the geometric data of the read fracture network, the primary fracture and the secondary fracture are extracted, wherein (a) is a schematic diagram of the multi-scale fracture model in the model, and (b) is a schematic diagram of the extracted primary fracture, (c) Schematic diagram of the extracted secondary fractures. For primary cracks, use the method described in step S130 to divide the unstructured grid and use the method described in step S140 to perform attribute mapping, as Figure 7 , where (a) is the model diagram of the corner grid and the primary fracture, (b) is the unstructured grid diagram obtained based on the division of the corner grid and the primary fracture; for the secondary fracture, the steps The method described in S150 performs attribute equivalence correction, Figure 8 As shown, (a) is the secondary frac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a fractured reservoir multi-scale fracture simulation method and a computer readable storage medium. The method comprises the steps that corner point grid model data, matrix attribute model data, fracture network model data and fracture attribute model data of a matrix are obtained; classifying and dividing the fracture network model into primary fractures and secondary fractures; constructing an unstructured basic grid based on the angular point grid model and the primary crack; utilizing a matrix attribute model and a crack attribute model to carry out attribute mapping on the unstructured basic grid; the matrix attribute of the mapped unstructured basic grid is corrected; and calculating the conductivity of the non-structured basic grid after attribute correction to obtain a non-structured hybrid grid model. By means of the simulation method, polarity discretization processing can be conducted on main-level cracks, flow characteristics of the cracks can be accurately captured, the precision of numerical simulation is improved, equivalence and coarsening methods are adopted for small and medium-scale cracks, and the efficiency of numerical simulation is greatly improved.

Description

technical field [0001] The present invention relates to the field of numerical simulation of oil reservoirs, and more specifically, relates to a method for simulating multi-scale fractures in fractured oil reservoirs and a computer-readable storage medium. Background technique [0002] Fractured reservoirs are a widely existing type of reservoirs. According to incomplete statistics, fractured reservoirs account for more than 28% of the proven geological reserves (Yuan Shiyi, Song Xinmin, Ran Qiquan. Fractured Reservoir Development Technology , Petroleum Industry Press, 2004). Usually, there are fractures with different sizes and properties in the reservoir. For the characteristics of fractures, the existing dual-media model (Warren, J.E. ) and discrete fracture model (Karimi-Fard, M., L.J.Durlofsky and K.Aziz. An efficient discrete-fracture model applicable for general-purpose reservoir simulators. SPE Journal, 2004, 9(2): 227-236) to Describe the cracks and provide models...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06T17/05G06T17/20
CPCG06T17/05G06T17/20G06T2210/04
Inventor 廉培庆张文彪段太忠赵华伟商晓飞李蒙刘彦锋吴双王鸣川
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap